Finding the Fourth Proportional to 112,840.18, 155,713.66 and 65,090.68
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Solution
The fourth proportional to 112,840.18, 155,713.66 and 65,090.68 is: 89,821.80
Step by Step Solution
- Step 1: Write the proportion equation
112,840.18 : 155,713.66 = 65,090.68 : x - Step 2: Convert to fraction form
112,840.18/155,713.66 = 65,090.68/x - Step 3: Cross multiply
112,840.18x = 155,713.66 × 65,090.68 - Step 4: Simplify right side
112,840.18x = 10,135,508,014.69 - Step 5: Solve for x
x = 10,135,508,014.69/112,840.18 - Step 6: Final answer
x = 89,821.80
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.